Using public channels with PHP

Using public channels with PHP

Public channels do not require authentication. Public channels can be used for features without sensitive information, such as these use cases:

• Notify all users with the e-commerce page loaded when a new product goes on sale.
• Live chat similar to YouTube chat.
• Trigger updates for all clients currently viewing a page when it changes.

Frontend

<html>
    <body>
       <h1>Pusher test</h1> 
      <script>
        document.addEventListener('DOMContentLoaded', function() {
            var pusher = new Pusher("RESSONANCE_APP_ID", {
                cluster: "default",
                wsHost: "websocket.ressonance.com",
                wsPort: 443,                  
                wssPort: 443,                 
                forceTLS: true,               
                disableStats: true,            
                enabledTransports: ["ws", "wss"]
            });

            var channel = pusher.subscribe("public-channel");

            channel.bind("new-release", (data) => {
                alert("New release", data.release);
            });
        });
      </script>
      <script src="https://js.pusher.com/8.3.0/pusher.min.js"></script>  
    </body>
</html>

Backend

composer require pusher/pusher-php-server

This is a small PHP example application.

<?php

require __DIR__ . '/vendor/autoload.php';

$pusher = new Pusher\Pusher(
    'RESSONANCE_APP_KEY',
    'RESSONANCE_APP_SECRET',
    'RESSONANCE_APP_ID',
    [
        'host' => 'websocket.ressonance.com',
        'port' => 443,
        'scheme' => 'https',
        'useTLS' => true,
    ]
);

header('Access-Control-Allow-Origin: *');
header('Access-Control-Allow-Methods: GET,POST,OPTIONS');
header('Access-Control-Allow-Headers: Content-Type');

if ($_SERVER['REQUEST_METHOD'] === 'OPTIONS') {
    http_response_code(204);
    exit;
}

if ($_SERVER['REQUEST_METHOD'] === 'GET' && $_SERVER['REQUEST_URI'] === '/send-public-event') {
    $pusher->trigger('public-channel', 'new-release', ['release' => 'hello world']);
    echo 'Event sent!';
    exit;
}

http_response_code(404);
echo 'Not found.';